Mechanical movement.



K. EGGART..v MECHANICAL MOVEMENT. APPLICATION FILED 0CT.30 19161Patented J uly, 31, 1917.

UNITED sTATEs PATENT oEEioE.

KARL EGGART, 0F ARBON, SWITZERLAND, ASSIGNOR TO THE FIRM OF ADOLPI-ISAURIER,

` OF ARBON, SWITZERLAND. f

MECHANICAL MOVEMENT.

i Specication of Letters Patent. Patented July 31, 1917.

Application filed October 30, 1916. Serial No. 128,403.

To all whom t may concern.'

Be it known that I, KARL EGGART, a citizen of the Republic ofSwitzerland, residing at Arbon, Switzerland, have invented certain newand useful Improvements in Mechanical Movements; and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and vuse the same, reference being had to theaccompanying drawings, and to letters or gures marked thereon, whichform a part of this specification.

This invention relates particularly to mechanisms for regulating thestroke or extent of movement of parts of embroidering machines whichperform special functions, as such parts may come into operation, as forinstance the minor and major threadguides. j Y

The stroke regulating mechanism which is shown herein as an embodimentof the invention includes a cam-disk arranged concentrically with theaxis of an oscillating arm and provided with a cam-groove whichcomprises a plurality of concentric sections, and a plurality ofinclined sections connecting said concentric sections. rlhe inclinedsections are adapted to effect a shifting or adjustment with respect tothe center of movement of said arm of a sliding part carried by said armand operatively connected to the party of the embroidering machine whosestroke is to be regulated. The concentric sections actas guides for theswinging arm during its oscillations.

It may be advisable in some cases to let said cam-disk cooperate with amember which is operatively connected to a shaft acted upon either bythe jacquard mechanism of the embroidering machine or by hand.

It may further be advisable in some cases to provide the cam-disk with aspiral or noncontinuous groove and to provide means whereby theoperative connection between said shaft acted upon by the jacquardmechanism 4or by hand and a member engaging with the cam'disk, may beinterrupted as groove.

Fig. 3 is a plan view, partly in section on the line C-D of Fig. 2, of adetail.

Fig. 4 shows a modification of the stroke regulating mechanism.

Fig. 5 Fig. 4, and

Fig. 6 is a plan view of this modification,

partly inY section, on the line Gr'-H ofV Fig. 5.

is a section on the line E-i-F ofV In carrying theV invention intoeffect as driving shaft l a cam 2. This acts upon a roller 3 mounted ona pin 4, which is carried by a hollow or tubular arm 5 adapted tooscillate on a stationary bearing 5. The

shown in Figs. 1 to 3 thereV is'fixed to a arm carries a slide or bolt 6which carries a transverse pin 7. To the latter is connected a rod 8,which is also connected to the minor thread-guide 9. The slide 6' alsocarries a stud 10" on which is mounted a roller 10 engaging the grooveof a toothed cam-disk'12.

" The groove referred to comprises sections 13 which are concentric tothe centerY of disk 12 and inclined sections 14, each of which connectstwo sections 13. The sections 13 and 14 form together a continuous orendless The toothed disk 12 engages a toothed wheel 15 fixed on a shaft16 to which may be imparted an intermittentV motion either by means ofthe jacquard mechanism of the embroidering machine or by hand.

The operation of this stroke regulating /mec'hanism is as follows:

The rotating cam 2 effects upon each revolution an Oscillation of arm 5throughthc angle a? (F ig. 2) for the purpose of imparting a workingstroke to rod 8, roller 10 being moved in and guided by a concentrlcsection 13 of the groove of disk 12. Should it be desired to vary thestroke off the minor thread-guide 9, there is effected a rotation ofshaft 16, such that the disk 12 is turned about an angle -i-g/ (Fi-g.2). Upon this rotation of the disk 12 the inclined section 14 of itsgroove engaging with the roller 10 effects a shifting or adjustment ofslide -6 with respect to the arm 5, so that said arm ,5 imparts adierent stroke to rod I8, and therefore also to the threadguide v9, uponits renewed oscillation. f

According as the disk 13 is turned each .time through a greater orsmaller angle .fr-iw, ,a greater or smaller variation `oit the stroke ofthe thread-,guide 9 may be obtained. It will be seen, that by means .ofa .cam-disk provided with a closed yendless groove as shown in Fig. 2 itis possible to vary the stroke of the thread-guide from a minimum to amaximum and then from a maximum to a minimum.

In the embodiment of the invention shown in Figs. 4, 5 and 6 thesections 18 and 14 of the groove in the disk 12 form a spiral ornoncontinuous groove. In such a stroke regulating mechanism it is,however, necessary to provide means to prevent the shaft 16, which isacted upon by the jacquard mechanism or by hand, from continuing therotation of the cam-disk after the end .of the groove abuts the roller10. Io this end `there is provided on the toothed cam-disk 12 forinstance a lateral projection or cam 17. The shaft 16 carries aclutch-disk 18 provided with at least one hole 19. 20 denotes a toothedwheel, which is movable longitudinally with respect to the clutch-disk18 and is adapted to be operatively connected thereto. For this purposethere is provided on said wheel 2O a lateral projection 21, which may bepushed into the hole 19 of disk 18. Toothed wheel 20 meshes with tootheddisk 12 and is mounted on a shaft or spindle 22 provided with a knob 23.The parts 18 and 2O are normally held in engagement by a spring 24. 25denotes a shifting lever cooperating with the projection 17 and bearingagainst a collar on the shaft or spindle 22 and adapted to effect thedisconnection of the parts 18 and 20. This takes place when the partshave lthe position shown in- Fig. 4. The latter corresponds to one ofthose positions of the disk 12, in which the roller 10 just abuts oneend of the cam-groove of the disk 12. Vhen the parts 18 and 20 are outof engagement, wheel 20 is, however, still in mesh with the toothed disk12, so that the roller 10 is kept in the proper position within thegroove of the disk 12 during oscillation of the link 5. `It will be seenl.tion the roller 1.0 is mounted directly 7on the pin '7 (Fig. '6), sothat the pin 10 shown in Figs. 2 and 8 may be dispensed with.

Although this invention has been .de scribed .as .applied to the case inwhich it effects a regulation of the stroke of the minor thread-guidesit is to be understood that it is equally applicable to other cases inwhich the stroke or extent of movement of a reciprocating element or ofa part actuated through a reciprocating element has to be regulated.

VI claim as my invention:

1. A mechanism tor .the purpose described comprising an .oscillatingarm, a cam mounted concentri'cally with the axis of oscillation fof saidarm, and slide Ymounted on said arm .and in operative eng-agement withthe cam to be shifted thereby onsaid arm.

2. A mechanism for the purpose described comprising an oscillating arm.a cam mounted concentrical-ly with the axis of oscillation'VVV oi saidarm, a slidemounted on said arm and in operative engagement with the camto be shifted thereby on said arm, anda connection Vfrom said arm. Y

8. A mechanism for the purpose described comprising an oscillating arm,a grooved cam-disk mounted concentrically withV the axis of oscillationof said arm, and a slide mounted on said arm and having engagement withthe groove of the camdisk.

4. A mechanism for the purpose described comprising Van oscillating arm7a grooved eamdisk mounted .concentrically with Vthe axis of oscillationof said arm, and having a plurality of concentric grooves and aplurality of inclined grooves connecting the concentricy grooves, and aslide mounted on comprising an oscillating arm, means to .os-`

cillate said arm, a cam mounted concentrically with the axis ofoscillation of said arm,

a slide `mounted on* said arm and in operative engagement with the camto be shifted thereby on said arm, and a link connected to said slide. Y

- 7. A lmechanism for the purpose described comprising a tubular armmounted to oscillate upon a transverse axis, a grooved camlie diskmounted concentrically with the axis of oscillation of said arm, and aslide mounted in said arm and having a stud to enter the groove of thecam.

8. A mechanism for the purpose described comprising a tubular armmounted to oscillate upon a transverse axis, a grooved camdisk mountedconcentrically with the aXis of oscillation of said arm, a slide mountedin said arm and having a stud to enter ythe groove of the cam, and alink connected to said slide.

9. A mechanism for the purpose described comprising an oscillating arm,a grooved cam-disk mounted concentrically with the axis of oscillationof said arm, means to rotate said cam-disk, a slide mounted on said armand in operative engagement with the cam-grooverto be shifted thereby onsaid arm, and means actuated by the rotation of 20 the cam-disk todisconnect the cam-disk from its rotating means.A

10. A mechanism for the purpose described comprising an oscillating arm,a grooved cam-disk mounted concentrically 25 With the axis ofoscillation of said arm, a driving gear for said cam-disk, a clutch fordriving said gear, and means actuated by the rotation of the cam-disk toopen said clutch.

In testimony that I claim the foregoing 3o as my invention, I havesigned my name in presence of tWo subscribing Witnesses.

KARL EGGART.

Witnesses:

FRANK DINNUKE, EMIL MEILE.

Copies of this patent may be obtained for ve cents each, by addressingther0ommissioner of Patents.

Washington, D. 0.

